CN108119164B - Prefabricated assembled composite support structure - Google Patents
Prefabricated assembled composite support structure Download PDFInfo
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- CN108119164B CN108119164B CN201810066397.2A CN201810066397A CN108119164B CN 108119164 B CN108119164 B CN 108119164B CN 201810066397 A CN201810066397 A CN 201810066397A CN 108119164 B CN108119164 B CN 108119164B
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- reinforced concrete
- concrete member
- roadway
- bracket
- tunnel
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- 239000002131 composite material Substances 0.000 title claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 81
- 239000010959 steel Substances 0.000 claims abstract description 81
- 230000008093 supporting effect Effects 0.000 claims abstract description 45
- 239000004567 concrete Substances 0.000 claims abstract description 17
- 239000011150 reinforced concrete Substances 0.000 claims description 49
- 239000011435 rock Substances 0.000 claims description 26
- 239000002023 wood Substances 0.000 claims description 25
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000002411 adverse Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000011900 installation process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 238000009933 burial Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention relates to a prefabricated assembly type supporting structure body which is applied to supporting of a roadway (tunnel), wherein the structure body is a prefabricated concrete member, a plurality of concrete members are assembled into a whole around the circumference of a channel, each concrete member is assembled with the other concrete member along the axial direction of the channel, and profile steel is fixedly arranged in the structure body. The structure is simple, the splicing is convenient, the stress condition of the profile steel bracket is improved, the adverse conditions such as stress concentration and unbalanced load are avoided, and the bearing capacity of the bracket is fully exerted.
Description
Technical Field
The invention relates to the field of roadway support, in particular to a prefabricated assembled composite support structure.
Background
At present, the main support technology of the deep well soft rock roadway comprises the following steps: an anchor net spraying support series technology, a section steel support series technology, a reinforced concrete structure support series technology, a steel pipe concrete support technology and the like.
With the increase of the roadway burial depth, the conventional supporting sections such as simple anchor rods, anchor ropes and the like can not meet the requirement of the stability of the roadway, and the composite supporting structure formed by anchor net spraying and supporting is required to be continuously repaired under the action of strong roadway surrounding rock pressure, so that the soft rock roadway is seriously deformed or even damaged.
The concrete filled steel tube bracket has high bearing capacity and good supporting effect in engineering practice, but the higher cost of the concrete filled steel tube bracket always restricts the popularization and application of the concrete filled steel tube bracket.
The U-shaped steel support participates in the combined support, which is one of the important ways for solving the difficult supporting problem of the high-pressure soft broken surrounding rock roadway. The U-shaped steel bracket has low cost and larger bearing capacity. However, in engineering practice, because the surface of the surrounding rock of the roadway is uneven, the stress condition of the bracket is complex, and the stress concentration or unbalanced load effect is easily formed. The U-shaped steel support is often bent and broken in a plane or overturned and twisted outside the plane under the pressure action of surrounding rocks of a roadway, wherein the U-shaped steel support is not damaged due to low resistance caused by structural instability, longitudinal stress and inclined loading, and the bearing capacity of the U-shaped steel support cannot be fully exerted. Once the support is destroyed under the conditions, almost all bearing capacity is lost, and the continuous repair in the later period not only causes the waste of funds, but also has high time cost.
In summary, the deep well soft rock roadway support technology mainly has the problems of low support structure bearing capacity, high cost, small contractible quantity and continuous repair of the roadway. If the U-shaped steel bracket can be ensured to be uniformly stressed, the influence of adverse conditions such as unbalanced load and the like is eliminated, the bearing capacity of the U-shaped steel bracket can be fully exerted under the same surrounding rock condition compared with the prior art, the purposes of maintaining the surrounding rock of a roadway and reducing the repair rate are achieved, and meanwhile, the cost is controlled within a certain range, so that a new method for supporting the soft rock roadway of the deep well is formed. The invention is based on a U-shaped steel bracket, combines with a prefabricated reinforced concrete arc plate and is assisted by conventional supporting means such as anchor rods, anchor ropes and the like, thereby achieving the purpose of controlling the stability of the deep well soft rock roadway.
Disclosure of Invention
The invention aims to provide a prefabricated composite supporting structure which solves the supporting problem of a deep well soft rock roadway. The underground supporting structure not only bears huge load, but also has complex stress conditions, and the life cycle of the supporting structure is too short due to the phenomena of stress concentration, unbalanced load and the like. How to ensure the strength of the supporting structure, relieve the structural damage caused by adverse conditions such as stress concentration, unbalanced load and the like, and reduce the repair rate of the roadway is a technical problem to be solved by the invention.
The structure body is a prefabricated reinforced concrete member, a plurality of reinforced concrete members are assembled into a whole around the circumference of the channel, and each reinforced concrete member is assembled with the other reinforced concrete member along the axial direction of the channel.
Further, the structure further comprises a groove provided on an inner side or an outer side of the reinforced concrete member in a thickness direction, and the shape of the groove matches with the shape of one side of the section steel.
Further, the structure further includes a pin hole provided on a side face of the reinforced concrete member in the width direction, and the reinforced concrete member is axially assembled with another reinforced concrete member along the passage through the pin hole and the pin.
Further, the structure body further comprises anchor rod/anchor rope holes, the anchor rod/anchor rope holes are arranged on two sides of the groove, and the reinforced concrete member is fixed on surrounding rock of the channel through the anchor rod/anchor rope holes.
Further, the structural body further comprises bolts, the bolts are fixedly connected with the reinforced concrete member and are arranged on two sides of the groove, and the section steel is fixed in the groove through the bolts.
Further, the profile steel is fixed in the groove through the clamping cable by the bolt, and the clamping cable is provided with a bolt hole.
Further, one end of the clamping cable is of a plate-shaped structure, the other end of the clamping cable is of a structure matched with the appearance of the other side of the section steel, and the other end of the clamping cable is fastened with the reinforced concrete member through a bolt to fix the section steel in the groove.
Further, the pin is characterized in that the pin is a concrete filled steel tube steel pin.
Further, the reinforced concrete members are circumferentially assembled into an integral structure by the pressing blocks around the channel, and the cross section shape of the pressing blocks is the same as that of the reinforced concrete members.
Further, the profile of the reinforced concrete member is an arc, strip or other curved non-arc structure.
The invention has at least the following beneficial effects:
(1) All prefabricated structures adopt consistent specifications, and batch production is convenient. The prefabricated structure body can be manufactured by using the same mould, so that the mould cost is reduced. The prefabricated structure body has simple structure and convenient splicing;
(2) The prefabricated structural body is prefabricated on the ground, so that the prefabricated structural body has higher strength, is used as a transition member between surrounding rock and a bracket, can convert complex stress conditions applied to the bracket by roadway surrounding rock into uniform load applied to the bracket by an arc plate, improves the stress conditions of the U-shaped steel bracket, avoids adverse conditions such as stress concentration, unbalanced load and the like, and fully exerts the bearing capacity of the bracket;
(3) 4 anchor rod (rope) holes are reserved on each prefabricated structure body, and in the underground construction process, the arc plates can be directly anchored on surrounding rock through the anchor rod (rope) holes, so that the construction is convenient, and meanwhile, the stability of the structure in the construction process is ensured;
(4) The middle part of the prefabricated structure body is provided with two grooves, the protrusions in the middle of the grooves are exactly matched with the U-shaped grooves on the support, so that the load is uniformly distributed on the support, the trend of the U-shaped steel support moving out of the plane is limited, and the support is prevented from turning and twisting out of the plane when the stress is overlarge;
(5) Two pressure relief modes: firstly, the yielding structures among the prefabricated structural bodies can realize the circumferential compression deformation of the roadway when bearing compressive stress, so as to achieve the purpose of yielding; and secondly, the U-shaped steel brackets are connected by using clamping cables, the tightness of the clamping cables is adjusted to enable the bracket joints to realize high-resistance sliding and timely clamping, and the accumulated pressure in the brackets is released to form the effect of yielding and resisting the appropriate effect. Two pressure relief modes well explain the supporting principle of avoiding the large deformation at the initial stage of roadway opening in the new Otto method so as to fully exert the self-bearing capacity of surrounding rock;
(6) The specification of the U-shaped steel is standardized, the processing and the repairing or the replacement are relatively simple and convenient, the transportation and the installation are convenient and quick, the U-shaped steel can be repeatedly utilized for many times, and the mechanical construction is facilitated;
(7) Compared with the use condition of the clamping cable under the normal condition, the clamping cable not only realizes the connection function of the U-shaped steel bracket, but also can fix the bracket on the prefabricated structure body, thereby limiting the movement trend of the bracket in or out of the plane, ensuring the stability of the bracket and fully playing the bearing capacity of the bracket;
(8) The steel pins made of the steel pipe concrete are used for axially connecting the single-ring supporting structural bodies together along the roadway, so that the single-ring supporting structural bodies cooperate to form an integral supporting structure, and the structural stability and the bearing capacity are further improved. In addition, the steel pin can also play a role in fixing the prefabricated structure body in the installation process of the prefabricated structure body;
(9) The steel pins connect the single-ring supporting structural bodies into a whole along the axial direction of the roadway, and the structural bodies cooperate to bear surrounding rock pressure together to maintain the roadway stable;
(10) The anchor rod/anchor cable hole is a long rectangular hole with round corners, so that the anchor cable is prevented from shearing damage caused by inconsistent deformation of the reinforced concrete arc plates and surrounding rocks.
Drawings
FIG. 1 is a schematic view of a prefabricated support structure according to the present invention
FIG. 2 is a schematic illustration of a cable structure;
FIG. 3 is a schematic view of a block structure;
FIG. 4 is a schematic view of a prefabricated assembled structure of the embedded steel;
FIG. 5 is a schematic view of a single loop support structure;
FIG. 6 is a schematic structural view of a support system;
the main reference numerals illustrate:
the steel pin is 1-steel pin, the wood block is 2-to-press, the prefabricated assembly structure is 3-, the anchor rod/anchor cable holes are 4-reserved, the bolts are 5-, the U-shaped steel support is 6-, the clamping cable is 7-, the grooves are 8-, the pin holes are 9-reserved, and the bolt holes are 10-.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in the figure, the structure of the invention is a prefabricated reinforced concrete member 3, a plurality of reinforced concrete members 3 are assembled into a whole around the circumference of the channel, and each reinforced concrete member 3 is assembled with the other reinforced concrete member 3 along the axial direction of the channel. Specifically, the structure further includes a groove 8, the groove 8 is provided on an inner side or an outer side of the reinforced concrete member 3 in the thickness direction, and the shape of the groove 8 matches with the shape of the U-section steel side. Specifically, the structure further includes a pin hole provided on a side surface of the reinforced concrete member 3 in the width direction, and the reinforced concrete member 3 is axially assembled with another reinforced concrete member 3 along the passage through the pin hole and the steel pin 1. Specifically, the structure body further comprises anchor rod/anchor rope holes 4, the anchor rod/anchor rope holes 4 are arranged on two sides of the groove 8, the reinforced concrete member 3 is fixed on surrounding rock of a channel through the anchor rod/anchor rope holes 4, and the anchor rod/anchor rope holes are long and narrow rectangular holes with round corners so as to prevent anchor rope shearing damage caused by inconsistent deformation of the reinforced concrete arc plates and the surrounding rock. Specifically, the structure body further comprises bolts 5, the bolts 5 are fixedly connected with the reinforced concrete member 3 and arranged on two sides of the groove 8, and the section steel is fixed in the groove through bolts. Specifically, the U-shaped steel is fixed in the groove 8 through the clamping cable 7 by the bolt, and the clamping cable 7 is provided with a bolt hole 10. Specifically, one end of the clamping cable 7 is of a plate-shaped structure, the other end of the clamping cable is of a structure matched with the appearance of the other side of the section steel, and the other end of the clamping cable 7 is fastened with the reinforced concrete member 3 through a bolt to fix the section steel in the groove 8. Specifically, the steel pin is a concrete filled steel tube steel pin. Specifically, the reinforced concrete members 3 are assembled into an integral structure around the channel circumference through the yielding blocks 2, and the cross section shape of the yielding blocks 2 is the same as that of the reinforced concrete members. Specifically, the profile of the reinforced concrete member is an arc, strip or other curved non-arc structure.
Specifically, a plurality of structures are around tunnel circumference is for assembling the structure constitution single ring support structure body as an organic whole, the embedded U shaped steel of single ring support structure body, a plurality of single ring support structure bodies are followed tunnel axial connection constitutes support system. See fig. 6. Specifically, the anchor rod/anchor cable hole is a long rectangular hole with round corners, so that the anchor cable is prevented from shearing damage caused by inconsistent deformation of the reinforced concrete arc plates and surrounding rocks. Specifically, the prefabricated assembly type structure body circumferentially surrounds the channel and is assembled into an integrated structure through the pressure-bearing wood blocks, and the cross section shape of the pressure-bearing wood blocks is identical to that of the prefabricated assembly type structure body. Specifically, the profile of the prefabricated structural body is an arc, long strip or other curved non-arc structure. That is, the supporting structure body can be designed into other shapes such as a flat ellipse, a vertical ellipse, etc.
Specifically, the single-ring supporting structure body consists of 6 arc plates 3, a yielding wood block 2 is arranged between the adjacent arc plates 3, and a U-shaped steel bracket 6 is arranged on the inner side of each arc plate 3 for ensuring the overall stability of the supporting structure body, and the bracket 6 is perfectly matched with the arc plates 3. The axial arc plates 3 of the roadway are connected through steel pins 1, and the annular arc plates 3 cooperate to form an integral supporting structure. The single ring support structure is shown in fig. 2, and the whole support system is shown in fig. 1.
The support structure body has two yielding modes, namely, the yielding mode is realized by the compressible wood blocks 2, when the support structure body is subjected to larger pressure, the yielding wood blocks 2 can be compressed along the circumferential direction of the roadway, and the support structure body tends to be in a standard circular state; and secondly, realizing yielding through the U-shaped steel bracket 6. The joint of the U-shaped steel bracket 6 is fixed on the arc plate 4 by the clamping cable 7, the resistance of the joint of the bracket 6 is realized by adjusting the tightness of the clamping cable 7, the high-resistance sliding effect is realized, the accumulated pressure in the bracket is released, and the purpose of yielding is achieved.
The single-ring supporting structure body is integrally connected along the axial direction of the roadway through the steel pin 1 made of steel pipe concrete, so that the structure bodies are cooperated, and the structural stability and the bearing capacity are improved.
The arc plate is a reinforced concrete structure body, and in order to ensure the strength of the reinforced concrete arc plate 3, the arc plate 3 is prefabricated on the ground. A tunnel section can be assembled by 6 sections of arc plates 3 to form a single-ring supporting structure body, and the single-ring supporting structure body extends along the axial direction of the tunnel to form complete supporting of the tunnel. The radius of curvature of the arc plate is designed according to the section size of the roadway, and the supporting structure body after the wood pressing block 2 is compressed by 50% is in a standard round shape. The arc plate 3 is provided with a pin hole 9, a bolt 5 and a groove 8.
The detailed structure of the arc plate is shown in fig. 4, and the functions of the pin hole 9, the bolt 5 and the groove 8 are respectively as follows: pin hole: the steel pipe concrete steel pin is inserted into the pin hole, and the single-ring supporting structures are connected together along the axial direction of the roadway, so that the single-ring supporting structures act cooperatively, and the integrity and the bearing capacity of the supporting structures are improved; and (3) a bolt: bolts are arranged on two sides of a groove in the middle of the arc plate, are poured on the arc plate, and can be provided with clamping cables 7 to fix and connect the U-shaped steel bracket 6, so that the movement trend of the bracket in or out of the plane is limited, and the bearing capacity of the bracket is fully exerted; groove: the grooves on the arc plates are two in number, and the U-shaped steel bracket can be embedded into the grooves to be perfectly matched with the arc plates. The fit uniformly applies the load to the bracket, improves the stress condition of the bracket, improves the integral bearing capacity of the supporting structure, and simultaneously prevents the bracket from turning and twisting out of plane; reserved anchor rod (cable) hole 4: in the arc plate installation process, the arc plate can be anchored on surrounding rock through a reserved anchor rod (rope) hole, so that the follow-up installation process is convenient to carry out. The reserved anchor rod (rope) holes are reserved, so that the stability of the structure body is indirectly improved.
The spatial positional relationship among the clamping cable, the U-shaped steel bracket, the arc plate, the bolt, the steel pin and other components is shown in fig. 6. And (3) cable clamping: is made of metal materials. The clamping cable is reserved with a bolt hole, and the clamping cable has the same curvature as the arc plate so as to be matched with the arc plate and the U-shaped steel bracket. The clamping cable has the functions of connecting the U-shaped steel bracket and fixing the U-shaped steel bracket on the arc plate, and simultaneously preventing the U-shaped steel bracket from bending and breaking in the plane or turning and twisting outside the plane caused by unbalanced load. Steel pin: and filling concrete into the hollow steel pipe to prepare the steel pipe concrete short column. The steel pin has the function of connecting the single-ring supporting structures into a whole along the axial direction of the roadway, so that the single-ring supporting structures cooperate, and the overall stability and the bearing capacity of the supporting structures are improved.
The structure of the pressed wood block is shown in fig. 6. The wood pressing block 2 is positioned between two adjacent arc plates. Taking a supporting structure body formed by 6 arc plates 3 as an example, the number of the wood pressing blocks is 6, and the wood pressing blocks are provided with grooves identical to the arc plates so as to be matched with the U-shaped steel bracket. The thickness of the wood block between the arc plates is generally between 0.5 and 1.0m, so that the wood block has larger compressibility and can play a role in yielding; to avoid the decay of the pressed wood blocks, the pressed wood blocks are subjected to preservative treatment, such as asphalt or asphalt impregnation; when the pressed wood blocks are placed, the direction of the wood strip fibers is kept along the radial direction of the roadway and is fully paved along the long axis direction of the roadway, so that the compressible characteristic of the wood blocks can be fully exerted and the arc plates can be uniformly stressed; the wood with moderate hardness should be selected for the wood block, and the compression amount is preferably about 50%. The wood block is too hard to play a role in yielding. Too soft wood blocks can be compressed too early due to the fact that the initial deformation speed of the roadway is high, compression amount is large, and the compression function cannot be achieved in the later period of the roadway.
The invention carries out the supporting construction of the roadway by the following method, the installation construction of the supporting structure body is simple and convenient, and the main used equipment is as follows: 1. simple monorail crane; 2. and (5) special installation equipment. The bottom arc plate can be lifted and positioned only by using a simple monorail crane. The rest arc plates are hoisted to special installation equipment through a monorail crane, and then the mechanical arm on the equipment completes actions such as translation and rotation, so that the arc plates can be installed in place.
Taking a supporting structure body formed by 6 sections of arc plates as an example, the construction process is as follows:
(1) The bottom plate sprays concrete to a certain height, and the arc plate is hoisted in place by a simple monorail crane. The arc plate is anchored on the bottom plate by the anchor rod through the reserved anchor rod (rope) holes on the arc plate, and the yielding blocks are arranged at the two ends of the arc plate.
(2) The rest arc plates are installed by a series of actions such as lifting, translation, rotation and the like through special installation equipment, after each arc plate is installed in place, the arc plates are anchored on surrounding rock through anchor rod (rope) holes reserved on the arc plates, cement mortar is filled between the arc plates and the surrounding rock by adopting a slurry spraying machine, and gangue woven bags can also be used for filling;
(3) After the arc plate and the wood block are installed to form a closed supporting structure, the U-shaped steel bracket is embedded into the grooves of the arc plate and the wood block, the joint of the U-shaped steel bracket is clamped by a clamping cable, and the tightness degree of the clamping cable is adjusted, so that the joint of the U-shaped steel bracket can move in a staggered manner to release the accumulated pressure in the bracket, and the pressure relief function is completed;
(4) And (3) finishing the installation of the single-ring supporting structure, performing the installation of the next-ring supporting structure, and repeating the steps (1), 2 and 3).
According to different conditions such as roadway burial depth, geological conditions, ground stress, lithology and the like, different support structure sizes need to be designed. The main parameters required to be determined according to the actual situation on site are as follows: the thickness, strength and curvature of the arc plates, the depth of the pin holes, the number of bolt groups on a single arc plate, the thickness of a yielding block, the compression thickness of the yielding block, the type and length of a steel pin, the type of a U-shaped steel bracket and the size of a clamping cable.
While the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims and their equivalents, and that such changes and modifications are to be construed as being within the scope of the present invention.
Claims (5)
1. The prefabricated assembled composite supporting structure is characterized in that the prefabricated assembled composite supporting structure is applied to the supporting of a roadway or a tunnel, a structural body is a prefabricated reinforced concrete member, a plurality of reinforced concrete members are assembled into an integral structure around the circumference of the roadway or the tunnel, and each reinforced concrete member is assembled with the other reinforced concrete member along the axial direction of the roadway or the tunnel;
the structure body also comprises a groove, wherein the groove is arranged on the inner side surface or the outer side surface of the reinforced concrete member along the thickness direction, and the shape of the groove is matched with the shape of one side of the section steel;
the structural body further comprises bolts, the bolts are fixedly connected with the reinforced concrete member and are arranged on two sides of the groove, and the section steel is fixed in the groove through the bolts;
the bolts fix two adjacent section steel joints in the grooves through clamping cables, and the clamping cables are provided with bolt holes;
one end of the clamping cable is of a plate-shaped structure, the other end of the clamping cable is of a structure matched with the appearance of the other side of the section steel, and the other end of the clamping cable is fastened with the reinforced concrete member through a bolt to fix the section steel in the groove; so that the high-resistance sliding of the support is realized by adjusting the tightness of the clamping cable, and the support is clamped timely;
the steel is a U-shaped steel bracket, the joint of the U-shaped steel bracket is fixed on the arc plate by a clamping cable, the resistance of the joint of the bracket is realized by adjusting the tightness of the clamping cable, the high-resistance sliding is realized, and the accumulated pressure in the bracket is released, so that the purpose of yielding is achieved;
the reinforced concrete members surround the tunnel or tunnel, and are assembled into an integral structure through the compression wood blocks, and the cross section shape of the compression wood blocks is the same as that of the reinforced concrete members.
2. The support structure of claim 1, wherein the structure further comprises pin holes provided on sides of the reinforced concrete member in the width direction, the reinforced concrete member being axially spliced with another reinforced concrete member along the roadway or tunnel by the pin holes and pins.
3. The support structure of claim 1, wherein the structure further comprises anchor rod/anchor cable holes provided on both sides of the recess, and the reinforced concrete member is fixed to surrounding rock of a roadway or tunnel through the anchor rod/anchor cable holes.
4. The support structure of claim 2, wherein the pin is a concrete-filled steel tube pin.
5. The support structure of claim 1, wherein the reinforced concrete member is contoured as an arc, strip or other curved non-arc structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017214624495 | 2017-11-06 | ||
| CN201721462449 | 2017-11-06 |
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| CN108119164A CN108119164A (en) | 2018-06-05 |
| CN108119164B true CN108119164B (en) | 2024-01-19 |
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| CN201810066397.2A Active CN108119164B (en) | 2017-11-06 | 2018-01-24 | Prefabricated assembled composite support structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500116B (en) * | 2019-01-22 | 2020-12-15 | 青岛理工大学 | Actively-draining anti-floating duct piece and lining structure |
| CN110056371A (en) * | 2019-05-28 | 2019-07-26 | 长安大学 | A kind of tunnel morning strong supporting system and its installation method |
| CN110043293A (en) * | 2019-05-28 | 2019-07-23 | 长安大学 | A kind of the tunnel morning strong supporting system and its installation method of bayonet joint |
| CN114320349B (en) * | 2021-12-30 | 2023-09-08 | 山东交通学院 | Highway tunnel primary support structure and construction method |
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| CN104763442A (en) * | 2015-03-12 | 2015-07-08 | 中国矿业大学(北京) | High-intensity large-shrinkage sealed cambered-plate support structural element |
| CN105484763A (en) * | 2015-12-03 | 2016-04-13 | 中国矿业大学(北京) | Semi-closed reinforced concrete prefabricated segment support system |
| CN105673040A (en) * | 2016-03-10 | 2016-06-15 | 安徽理工大学 | Bearing system of deep well high-stress roadway surrounding rock enhanced support and application of bearing system |
| CN106593467A (en) * | 2016-11-09 | 2017-04-26 | 大唐陇东能源有限公司 | Supporting method for underground soft rock roadway of coal mine |
| CN107044288A (en) * | 2017-05-22 | 2017-08-15 | 中铁第勘察设计院集团有限公司 | Prefabricated support lining structure and construction method for large-deformation tunnel in soft rock |
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